Question

2. 18% of 650 boys in a school take commerce. How many boys take commerce?

3. Certain cereal contains 12% of protein. How many grams of protein is there in a 14 g package?

4. There are 160 pages in a book. 15% of the pages have pictures on them, How many pages do not have pictures on them?

5. When making a journey I walked 12%, ran 16% and rode on a scooter 28% of the total distance and for the remaining part, I travelled by bus. How many kilometres did I travel by bus, if the total distance covered was 50 km?

6. (1) Out of every 20 vehicles passing a certain spot 7 were buses. What percentage was this? () Out of 400 tickets sold at a tennis match, 144 were sold to senior citizens. What per cent of the tickets were sold to senior citizens? What per cent were sold to the rest?

7. You spend 7 hours out of 24 hours at school. What percentage of a day is this?

8. A certain alloy consists 3 parts of tin to 5 parts of copper. What is the percentage composition of the alloy? Hint. Ratio of tin to copper 3:5)

9. The price of a muffin increases from 4 to 5. What is the percentage increase?

10. The number of people employed in a firm decreased from 240 to 210. Find the percentage decrease

11. The speed of a train is 80 km/hr. It is (1) increased to 130 km/hr. Find the percentage increase. (ii) decreased to 65 km/hr. Find the percentage decrease

12. A four metre elastic band is increased by 10%. Find its new length.

13. The length of a rope is decreased by 12%. What is the new length if it was 150 metres?

14. The monthly expenditure of a family on milk is 700. If the price of the milk increased by 8% find the increase in the expenditure of the family on milk.

15. The population of an Indian state is 8 crore. If it increases by 2% every year, find the population of the state after one year.

16. A company used 75% of its profits to buy new machinery and raw materials. If this amounted to 85,071, А find the total profit of the company.

17. A man left 25% of his money to his mother, 55% to his daughter and the remaining 9000 to his brother. How much money did he leave? Find the shares of his mother and daughter.​

Answer 1

Explanation:

2) Boys = 650

commerce boys =(18/100×650)

Answer is 117.

3)

Answer 2

Answer:

2. Taking commerce = 18% of 650

( 18/100 × 650) = 117 boys take commerce

3. protein has = (14 × 12/100)

= 42/25 = 1.68 gm

4. (100-15)% = 85 %

= (160 × 85/100)

= 136